So he has shown willingness to kill the loved ones of those he feels have wronged them, even if they were on his side.
What he has shown is that he's read Ho Chi Minh's playbook: He understands how to invoke terror.
You don't terrorize people by killing them. You terrorize people by striking out at what they care for, and you make them understand that they are powerless to protect what they care for. You kill their dog. You rape their wife. You kill their children. You not only terrorize the people you are directly targeting, but you terrorize those who are their associates, or those who self-associate with the target. It's worked for eons.. for the IRA, the Mafia, the Viet Cong, etc. It's working here. How do you think the LEO's who worked directly with him feel about their job as they are looking for him... knowing that their wives and children and homes are not being protected by their husbands and fathers... because they are elsewhere? Trust me... they are scared, and so are their families. That's called terror. You can effect any end if you are willing to use terror as a tool. Contemplate this: Imagine that he is able to track down and kill the daughters of ten of his former LAPD associates: The result would be that the other 1000 of his former LAPD associates would call it quits for looking for him, and go home to circle their own wagons around their own families. Getting your enemy to quit the fight in droves is more effective than killing your enemies one by one. Kill one and you kill one. Terrorize 10 and you take 1000 out of the fight. Hearts and Minds... classic assymetric warfare.
This is the classic guerilla warfare. He's dangerous because he's smart and he's studied history a little.
Contemplate this, which is fiction but is so well written that it stands as an example: It's the musings of Kurtz, played by Marlon Brando:
We went into a camp to inoculate the children. We left the camp after we had inoculated the children for Polio, and this old man came running after us, and he was crying. He couldn't see. We went back there, and they had come and hacked off every inoculated arm. There they were in a pile. A pile of little arms. And I remember I cried. I wept like some grandmother. I wanted to tear my teeth out. I didn't know what I wanted to do. And I want to remember it. I never want to forget it. I never want to forget. And then I realized, like I was shot, like I was shot with a diamond, a diamond bullet right through my forehead. And I thought: My God the genius of that. The genius. The will to do that. Perfect, genuine, complete, crystalline, pure. And then I realized they were stronger than we. Because they could stand that these were not monsters. These were men, trained cadres. These men who fought with their hearts, who had families, who had children, who were filled with love but they had the strength, the strength to do that. If I had ten divisions of those men, then our troubles here would be over very quickly. You have to have men who are moral and at the same time who are able to utilize their primordial instincts to kill without feeling without passion without judgment... without judgment. Because it's judgment that defeats us....
Think it's fiction?
The other effect of the classic use of terror is that the target of the terror will lash out and harm innocents who are mistaken to be the terrorist. This is a result of fear... over-reaction. This then turns the people against the target of the terror, further weakening them. How many Vietnamese villages did we seach, how many tons of rice did we burn, in Viet Nam... making people who might not have been VC sympathizers into our lifelong enemies?
How does this look for the police in CA?
"Police gave no warning as they mistakenly shoot woman, 71, delivering newspapers and then target another innocent bystander during California manhunt for 'killer' ex-cop"
How many life-long bitter enemies have the police in California made this week?
Do you think the loved ones of the people targeted blame the terrorist, or the police?
The reason the police are afraid is... because they are afraid. They ought to be.